Improvement in springs for doors and gates



C. W. SALADEE. Improvement in Springs for Doors and Gates.

Patented Feb. 20, 1872.

UNITED STATES PATENT OFFICE.

CYRUS W. SALADEE, OF ST. OATHARINES, CANADA, ASSIGNOR TO HIMSELF AND L. DOBBINS, OF ERIE, PENNSYLVANIA.

IMPROVEMENT IN SPRINGS FOR DOORS AND GATES.

Specification forming part of Letters Patent No. 123,843, dated February 20, 1872.

SPECIFICATION.

Be it known that I, OYRUs W. SALADEE, of St. (latharines, in the Dominion of Canada, have invented certain Improvements in Torsion-Springs for Closing Doors and Gates, of which the following is a specification embodying my invention:

In the drawing, Figure l is a face view of a door and easing, showing the torsion-spring A secured to the casing E by means of the brackets B and B. Fig. 2 is a top view of the spring-connections, clearly showing the position of the arms A and A as connected to the top of the torsion-spring and to the door F. Fig. 3 is an enlarged view of the devices for eonnectin g the torsion-spring with the door.

B is a bracket, which is secured to the doorcasing, as seen in Fig. 1. A is the lower arm, and upon the inner end of which is formed, at right angles with the arm, the stud M, which is made to pass through a corresponding hole in the head of the bracket B, and is of sufticient length after passing through the bracket to receive the screw'nut N, and which latter prevents the stud M of the arm A lifting up out of the bracket when in operation. Through the center of the stud M is made a square hole, and into which the top end of the torsion-spring A is rigidly secured by means of a corresponding square being formed on that end of the spring. The upper arm A has one end pivoted to the outer extremity of the lower arm A as seen at K J, Fig. 3, and the other end of the upper arm A has a pin, L, formed upon the under side, which latter hinges into a corresponding eye secured to the door, as is more plainly seen in Fig. 2. The lower end of the torsion-spring A is rigidly secured to the bracket B by a square hole and corresponding square upon the end of the spring, and which lower bracket is also firmly secured to the casing of the door on a line with the upper one, and so that whilethe lower end of the spring is being rigidly held to the casin g at that point the upper end is permitted to rotate with the stud M of the lower arm A as the door is opened and closed.

By reference to Fig. 2 it will be understood that as the door is opened the point at L will move away from the bracket B of the spring, and as it closes it will approach the bracket again, and thus hold the door firmly closed.

The arrangement of the parts A B, M, and N in combination with the top of the torsionspring A are not limited in their application to the frame E and door F by means ofthe upper arm A as shown in Figs. 1, 2, and 3; but may apply equally well in combination with any other mode of connecting the lower arm A to the door, as may be seen by Fig. 4; but

What I especially claim as my invention, 

